1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
namespace System.Web.Mvc {
using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.IO;
using System.Linq;
using System.Reflection;
internal static class TypeCacheUtil {
private static IEnumerable<Type> FilterTypesInAssemblies(IBuildManager buildManager, Predicate<Type> predicate) {
// Go through all assemblies referenced by the application and search for types matching a predicate
IEnumerable<Type> typesSoFar = Type.EmptyTypes;
ICollection assemblies = buildManager.GetReferencedAssemblies();
foreach (Assembly assembly in assemblies) {
Type[] typesInAsm;
try {
typesInAsm = assembly.GetTypes();
}
catch (ReflectionTypeLoadException ex) {
typesInAsm = ex.Types;
}
typesSoFar = typesSoFar.Concat(typesInAsm);
}
return typesSoFar.Where(type => TypeIsPublicClass(type) && predicate(type));
}
public static List<Type> GetFilteredTypesFromAssemblies(string cacheName, Predicate<Type> predicate, IBuildManager buildManager) {
TypeCacheSerializer serializer = new TypeCacheSerializer();
// first, try reading from the cache on disk
List<Type> matchingTypes = ReadTypesFromCache(cacheName, predicate, buildManager, serializer);
if (matchingTypes != null) {
return matchingTypes;
}
// if reading from the cache failed, enumerate over every assembly looking for a matching type
matchingTypes = FilterTypesInAssemblies(buildManager, predicate).ToList();
// finally, save the cache back to disk
SaveTypesToCache(cacheName, matchingTypes, buildManager, serializer);
return matchingTypes;
}
[SuppressMessage("Microsoft.Design", "CA1031:DoNotCatchGeneralExceptionTypes", Justification = "Cache failures are not fatal, and the code should continue executing normally.")]
internal static List<Type> ReadTypesFromCache(string cacheName, Predicate<Type> predicate, IBuildManager buildManager, TypeCacheSerializer serializer) {
try {
Stream stream = buildManager.ReadCachedFile(cacheName);
if (stream != null) {
using (StreamReader reader = new StreamReader(stream)) {
List<Type> deserializedTypes = serializer.DeserializeTypes(reader);
if (deserializedTypes != null && deserializedTypes.All(type => TypeIsPublicClass(type) && predicate(type))) {
// If all read types still match the predicate, success!
return deserializedTypes;
}
}
}
}
catch {
}
return null;
}
[SuppressMessage("Microsoft.Design", "CA1031:DoNotCatchGeneralExceptionTypes", Justification = "Cache failures are not fatal, and the code should continue executing normally.")]
internal static void SaveTypesToCache(string cacheName, IList<Type> matchingTypes, IBuildManager buildManager, TypeCacheSerializer serializer) {
try {
Stream stream = buildManager.CreateCachedFile(cacheName);
if (stream != null) {
using (StreamWriter writer = new StreamWriter(stream)) {
serializer.SerializeTypes(matchingTypes, writer);
}
}
}
catch {
}
}
private static bool TypeIsPublicClass(Type type) {
return (type != null && type.IsPublic && type.IsClass && !type.IsAbstract);
}
}
}
|
